def dechiffre(keys):
X, Y = [], []
for ind, key in enumerate(keys):
key = b64decode(key)
uidxor, x ,y = key.split(":")
uid = polynome.combine(uidxor, y)
if ind == 0:
uidsuite = uid
need = len(uid) - 1
X.append(int(x))
Y.append(int(y))
else:
if uid == uidsuite :
if need > 0:
X.append(int(x))
Y.append(int(y))
need-=1
else:
break
else:
print "La clé numéro " + str(ind+1) +" ne correspond pas"
sys.exit()
if need > 0:
print "Nombre de clés insuffisant"
sys.exit()
pol = lagrange(X, Y)
return int2String(int(pol.eval(0)))
def chiffre(chaine, degre, nb_cle):
pol = genPoly(string2Int(chaine), degre)
keys = genKeys(pol, genListe(nb_cle))
randpool = ascii_letters + digits
uid = "".join([random.choice(randpool) for k in range(degre+1)])
return [b64encode(polynome.combine(uid,y)+":"+str(x)+":"+str(y)) for x,y in keys]
